Effect of Body Mass Index in Coronary CT Angiography Performed on a 256-Slice Multi-Detector CT Scanner

Law, Wei-Yip; Guan-Lin, Huang; Yang, Ching-Ching

doi:10.3390/diagnostics12020319

Cited by 10 publications

(7 citation statements)

References 27 publications

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“…Furthermore, every 1 kg/m 2 increase in BMI led to a 5–7% increase in the incidence of CAD across all BMI categories [ 62 , 63 ]. CCT has relatively good sensitivity and specificity; however, even using modern and up-to-date equipment could not always guarantee high image quality for overweight or obese patients [ 64 ]. Echocardiography also needs a good visualization, which may be impaired in this group of patients.…”

Section: Discussionmentioning

confidence: 99%

The Effect of Obesity on Repolarization and Other ECG Parameters

Dykiert,

Kraik,

Jurczenko

et al. 2024

JCM

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Background: Overweight and obesity are important risk factors in the development of cardiovascular diseases. New repolarization markers, such as the Tpeak-Tend interval and JTpeak intervals, have not yet been profoundly studied in obese patients. The study aims to analyze whether, in patients with obesity and overweight, repolarization markers, including the Tpeak-Tend interval, are prolonged and simultaneously check the frequency of other ECG pathologies in a 12-lead ECG in this group of patients. Methods: A study group consisted of 181 adults (90 females and 91 males) with overweight and first-class obesity. The participants completed a questionnaire, and the ECG was performed and analyzed. Results: When analyzing the classic markers, only QT dispersion was significantly higher in obese people. The Tpeak-Tend parameter (97.08 ms ± 23.38 vs. 89.74 ms ± 12.88, respectively), its dispersion, and JTpeak-JTend parameters were statistically significantly longer in the obese group than in the controls. There were also substantial differences in P-wave, QRS duration, and P-wave dispersion, which were the highest in obese people. Tpeak-Tend was positively correlated with body mass and waist circumference, while JTpeak was with BMI, hip circumference, and WHR. Tpeak/JT was positively correlated with WHR and BMI. In backward stepwise multiple regression analysis for JTpeak-WHR, type 2 diabetes and smoking had the highest statistical significance. Conclusions: Only selected repolarization markers are significantly prolonged in patients with class 1 obesity and, additionally, in this group, we identified more pathologies of P wave as well as prolonged QRS duration,

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Section: Discussionmentioning

confidence: 99%

The Effect of Obesity on Repolarization and Other ECG Parameters

Dykiert,

Kraik,

Jurczenko

et al. 2024

JCM

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“…Photon attenuation increases exponentially with increasing patient thickness. Hence, the aim in imaging obese patients must be to improve image quality according to the as low as reasonable achievable (ALARA) statement (19,20). While obese patients are often subjected to repeated projections/scans and therefore increased radiation doses, despite the use of dose modulation techniques, acceptance of decreased image quality may result in a quasi-adherence to ALARA principles (21).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Image Quality of Overweight and Obese Patients in CT Using High Data Rate Detectors

Feldmane¹,

Gampp²,

Hausmann³

et al. 2023

In Vivo

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Background/Aim: To evaluate the impact of high data rate and sampling frequency detector technology compared to standard scan equipment on the image quality in abdominal computed tomography (CT) of overweight and obese patients. Patients and Methods: A total of 173 patients were retrospectively included in this study. Objective image quality in abdominal CT was evaluated using comparative analysis with new detector technology prior to market launch and standard CT equipment. Contrast noise ratio (CNR), image noise, volumetric computed tomography dose index (CTDI Vol ), and figures of merit (Q and Q 1 ) were assessed for all patients. Results: Image quality was superior in the new detector technology for all parameters evaluated. The dose dependent parameters Q and Q 1 showed a significant difference (p<0.001). Conclusion: A significant increase in objective image quality could be demonstrated using a new generation detector setup with increased frequency transfer in abdominal CT of overweight patients.

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“…The energy-dependent absorption of polychromatic X-ray photons leads to beam-hardening artifacts, commonly known as “cupping artifacts”, in the middle of a uniform object. The beam-hardening artifacts may cause CT number anomalies in dense materials (e.g., bone and dental enamel) and shades or streaks around highly attenuating objects [ 9 , 10 , 11 , 12 ]. The scattered X-ray photons also produce artifacts appearing as blurring, shades, and streaks.…”

Section: Introductionmentioning

confidence: 99%

3D Digital Modeling of Dental Casts from Their 3D CT Images with Scatter and Beam-Hardening Correction

Hegazy,

Cho,

Cho

et al. 2024

Sensors

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Dental 3D modeling plays a pivotal role in digital dentistry, offering precise tools for treatment planning, implant placement, and prosthesis customization. Traditional methods rely on physical plaster casts, which pose challenges in storage, accessibility, and accuracy, fueling interest in digitization using 3D computed tomography (CT) imaging. We introduce a method that can reduce both artifacts simultaneously. To validate the proposed method, we carried out CT scan experiments using plaster dental casts created from dental impressions. After the artifact correction, the CT image quality was greatly improved in terms of image uniformity, contrast-to-noise ratio (CNR), and edge sharpness. We examined the correction effects on the accuracy of the 3D models generated from the CT images. As referenced to the 3D models derived from the optical scan data, the root mean square (RMS) errors were reduced by 8.8~71.7% for three dental casts of different sizes and shapes. Our method offers a solution to challenges posed by artifacts in CT scanning of plaster dental casts, leading to enhanced 3D model accuracy. This advancement holds promise for dental professionals seeking precise digital modeling for diverse applications in dentistry.

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Effect of Body Mass Index in Coronary CT Angiography Performed on a 256-Slice Multi-Detector CT Scanner

Cited by 10 publications

References 27 publications

The Effect of Obesity on Repolarization and Other ECG Parameters

The Effect of Obesity on Repolarization and Other ECG Parameters

Evaluation of Image Quality of Overweight and Obese Patients in CT Using High Data Rate Detectors

3D Digital Modeling of Dental Casts from Their 3D CT Images with Scatter and Beam-Hardening Correction

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